Erwinia carotovora subsp. carotovora引起文心蘭及虎頭蘭之細菌性軟腐病

Soft Rot of Oncidium ＂Gower Ramsey＂ and cymbidium sp. caused by Erwinia carotovora subsp. carotovora

蘇秋竹(C. C. Su) ； 呂理燊(L. S. Leu)

《植物病理學會刊》 1卷4期 (1992/12) Pp. 190-195

https://doi.org/10.6649/PPB.199212_1(4).0005

摘要

自埔里及台中市採集之文心蘭(Oncidium ＂Gower Ramsey＂)及虎頭蘭(Cymbidium sp.)之軟腐組織分離得Erwinia屬軟腐細菌共14個菌株。依據生理、生化測試結果得悉此14個菌株皆爲Erwinia carotovora subsp. carotovora (Ecc)。病原性測定，此些Ecc軟腐細菌菌株均會感染此二種蘭花，其所引起之軟腐病徵，與田間發生者相似。於文心蘭之病徵，最初從假球莖近基部或側枝尖端及基部出現水浸狀淡黃點斑，逐漸蔓延至整個假球莖或側枝，導致整株軟腐黃化死亡或部份死亡；而虎頭蘭之病徵出現於新形成之側枝近地基部部份，初呈褐色水浸狀斑，逐漸蔓延至新側枝引起軟腐，心芽易脫落，偶而亦能蔓延至已成熟之假球莖。所有14個菌株對胡蘿蔔、馬鈴薯、蘿蔔、甘薯及芋頭之貯藏器官，胡瓜、茄子及甜椒之果實，洋葱鱗莖，結球白菜及甘藍之葉柄等組織皆有强烈之致腐能力；但對青蒜基部則不具致腐能力。

關鍵字

文心蘭 ； 虎頭蘭 ； 軟腐細菌

並列摘要

Fourteen bacterial strains isolated from soft rotted tissues of Oncidium ＂Gower Ramsey＂ and Cymbidium sp. collected in Puli and Taichung areas. On the basis of physiological and biochemical tests, all fourteen strains were identified as Erwinia carotovora subsp. carotovora (Ecc). These strains induced soft rot symptoms similar to those observed in the field. On Oncidium ＂Gower Ramsey＂ the symptom first appeared as pale yellow, water-soaked spot on the basal part of pseudobulbs, or on the top and basal parts of young lateral shoots, which might expand gradually to other parts and became soft rot, finally all or part of plantlets died; On Cymbidium sp., the symptom first appeared as dark green, water soaked spots on the basal part of lateral shoots, which expanded gradually, and became soft rot, but matured pseudobulbs were rarely affected. Strains of Ecc induced soft rot extensively on tissue slices of storage organs of carrot, potato, radish, sweet potato and taro, fruit sections of cucumber, eggplant and sweet pepper, detached bulb scales of onion, and petioles of cabbage and Chinese cabbage but not on basal parts of garlic plants.

並列關鍵字

Oncidium ＂Gower Ramsey＂ ； cymbidium sp. ； Erwinia carotovora subsp ； carotovora